V
¨ In case of input voltage unbalance, install AC reactor. Power Factor capacitors and
generators may become overheated and damaged due to potential high frequency
noise transmitted from inverter.
¨ Use an insulation-rectified motor or take measures to suppress the micro surge voltage
when driving 400V class motor with inverter. A micro surge voltage attributable to
wiring constant is generated at motor terminals, and may deteriorate insulation and
damage motor.
¨ Before operating unit and prior to user programming, reset user parameters to default
settings.
¨ Inverter can easily be set to high-speed operations, Verify capability of motor or
machinery prior to operating unit.
¨ Stopping torque is not produced when using the DC-Break function. Install separate
equipment when stopping torque is needed.
(5) Fault prevention precautions
¨ Provide a safety backup such as an emergency brake which will prevent the machine
and equipment from hazardous conditions if the inverter fails.
(6) Maintenance, inspection and parts replacement
¨ Do not conduct a megger (insulation resistance) test on the control circuit of the
inverter.
¨ Refer to Chapter 8 for periodic inspection (parts replacement).
(7) Disposal
¨ Handle the inverter as an industrial waste when disposing of it.
(8) General instructions
Many of the diagrams and drawings in this instruction manual show the inverter without a circuit
breaker, a cover or partially open. Never run the inverter like this. Always place the cover with
circuit breakers and follow this instruction manual when operating the inverter.
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